m48t12 STMicroelectronics, m48t12 Datasheet - Page 5

• Manufacturer Part Number: m48t12
• Description: 5.0v, 16 Kbit 2kb X 8 Timekeeper Sram
• Manufacturer: STMicroelectronics

1
Summary description
The M48T02/12 TIMEKEEPER
clock which is pin and functional compatible with the DS1642.
A special 24-pin, 600mil DIP CAPHAT™ package houses the M48T02/12 silicon with a
quartz crystal and a long life lithium button cell to form a highly integrated battery backed-up
memory and real time clock solution.
The M48T02/12 button cell has sufficient capacity and storage life to maintain data and
clock functionality for an accumulated time period of at least 10 years in the absence of
power over the operating temperature range.
The M48T02/12 is a non-volatile pin and function equivalent to any JEDEC standard 2Kb x 8
SRAM. It also easily fits into many ROM, EPROM, and EEPROM sockets, providing the
non-volatility of PROMs without any requirement for special WRITE timing or limitations on
the number of WRITEs that can be performed.
Figure 1.
Table 1.
A0-A10
DQ0-DQ7
E
G
W
V
V
CC
SS
Logic diagram
Signal names
A0-A10
Address Inputs
Data Inputs / Outputs
Chip Enable
Output Enable
WRITE Enable
Supply Voltage
Ground
W
G
E
®
RAM is a 2Kb x 8 non-volatile static RAM and real time
11
V CC
V SS
M48T02
M48T12
8
DQ0-DQ7
AI01027
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